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Penetration Grade bitumen are specified by the penetration and softening point test. The designation is by penetration range only. The penetration grade bitumen have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. This unique temperature/viscosity relationship is important when determining the performance parameters such as the adhesion, rheology, durability and application temperatures of bitumen.
Origin – Iran , UAE
ASTM D946-09 Grades:
Bitumen Penetration Grade 40-50
Bitumen Penetration Grade 60-70
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